Air brake for motor-propelled rail cars



Aug., 25, E923. E A

F. L. LHPCOT ET AL.

AIR BRAKE FOR MOTOR PROPELLED `RAIL CARS Filed March 17 1922 llllll'l :Patented Aug. 28, i923,

FRED L. Lrrco'r, CHARLESN. DRUMM, .mesma MAXIMILIAN G. ERINS, or NEW: Youri, N. Y.; AssIGNoBs 'ro INTERNATIONAL' Moron coMrANY, or; NEWQYQRK, N.v Y.,-.a-.

CVRPORATION OF DELAWARE.

' AIR RAKE- FOB` MOTOR-PROPELL'EDRAIL CARS.

AppleationledMarch: 17, 1922. SerialNo. 544,615;r

To all 107mm tf mayv concer-n.' Y

Be it known thatY we,y 'FRED Lireo'r, Crmnnns F. DRUMM, J r., and MAXHHLIAN (5.-, FiuNs, citizensroif the l. UnitedE States,. residing, respectively, in the borough; of: Manhatten,- in theiborough of Queens, andfin the boroughof Manhattanv of the) city Vof New. York, in the State; of New York, have; in.A vented` certain. new; and-useful Improvements in. Air Brakes for Motor-Propelled Rail.:V YGars, of: which the following isa specifica-f Y tion',y reference being; had to; the accompanyingl drawing,` forming a. partzhereof. V

Thisinvention: relates to. air brakes-for rail cars. which are propelled by( an engine and will lind,` its'. most. important; application to the traction wheels of` such-cars. Theprin'ci.-

" palobject of thefinventiona. isto provide" an adaptation of air brakes to suchr uses which shall be: simpleI in: construct-ion, readily applicable to the standard partsy of' such: a= rail. can, invariabler infoperation and effective' in action to exert uniform unit pressures on` the treads ofl the wheels at. all loads,` the proper relation of theshoes to: the-treads under,v dif;y ferent loads: beingsubstantially preserved within practical. limitsby the improvedcnrn'- struction; More particularly, the invention relates to an airv brake construction@v in f whiclr the bra-kingl power: shall be applied; through simple rigging and one which sha-'ll transmit the' braking' forces' tol the' shoes at opposite sides ofthe vehicle; uniformly andwithout.

torsional stressesV in theA rigging: Still/*another object of thelv invention is t'o mount; the brake shoes-from the frame'. of the vehicle and connect. them operatively Vto theibrake' cylinders.' by devicesv which. shall maintain the'shoes concentricv with the curved treads whenV the frame.' moves up mid' down under varying loads Yand' conditions of use.

In the accompanying drawing. the invention: hasbeen shown as' embodied' in a suit'- able brake rigging-'for application tothe A construction. l

En the drawings z' Figure l is a View partly in elevation and: partly in vertical sectionv showingy so; much of th'e'irnproved air brakeas isl necessary l for' an understandingof the Aoperation thereby' of one? brakeY shoe on: one wheel.

and down; relatively thereto: under. varying loads; and conditions. of operation. `Fronr the 'side fr-.an'ramem'bers e: of 'the chassis.

supportedswinging links :ofas from .bracketsV d`y securedj to the? side: frame' members and'. in'

which may be4 journaled a: suppontinginoid ef or'. the likeV for;` atta'chrnent;A of' the links It; will be understoodzY that whilethelinks1c w maybe otherwise pivotally: supported on the chassis, the. single. throughrod e extending from side to side between the frame meme. bers-a may lend some additional rigidity to the VframeY and facilitate assembling: .rln

the lower ends of the links is: pivotallyfsupported al transverse brake'` beams. fwhi'ch may conveniently' be of circular andgpen h'aps, tubularforrn. 'Ad-jucent vtothe outer ends of the brake; beam filare secured; lixedg-- ly bra-ke shoesY gfin operative.;relationto-.the traction-i wheels 7L' at. opposite sides. of" the car.` A boltgf* may'be'employedrto secure the shoe g rigidly toI theI .bra-kgejbeani The curved face. g2 of each bra-ke shoe. will, of course be Y formed. concentri-cy with 'the' tread; ofv theY wheel's L; Y "j Y yThe means for applying the,brakes g. will now be described. On thedeadA axlexhousing l)A mayl be seciired-` supporting `brackets 172,13", preferably at opposite. sides ofthe mid secte tion; It' is. frequentlyfthe practice to. bolt axle-tubes b' to-y ax central housing; 6.-" for the na'l; drivev gear and when this'is: done it'.` is found', feasible to'. employ the saine bolts'. b2

to@securethe-respective'brackets ,"Z'Qto' the -1 deadf axlel housing; For convenience',y the under-side of thesbrackets will be; curvedY -to conform` to Jche curvature of the housing on which they rest. Onthe brackets..z',`",.are supported brake cylinders- 7c, l 70. ,z respectively.. which" are offsirnilaeinternali. construction includingE a piston 762-; whizclrfinoves against the action'. ofr the spring: 76.31 undenthe influenceo'l2 air admitted at one end through the supply pipe 7a4- rhestem 70.5- of' the piston entendsl through the.. opposite.l end.V of the Y Y .ee

cylinder and is operatively connected to the brakebeam f. VVarious link connections #maybe employed, but that shown in'the drawings has been found to be satisfactory in practice. On each of the brackets z, z,

is pivotally supported an operating lever Z,"Z, respectively, as'by pivot pins Z2. One.

end of each operating lever is pivot-ally connected to the steam 705 of the pistons 162 within the cylinders 7e', 7c', respectively. The

levers Z, Z, are connected at the other side of their pivot pins Z2 through adjustable rods. '77%, m respectively, with the brake beam The rods m, m', may be pivotally connected tothe respective levers by Ypins m2. A turn buckle adjustment,l indicated generally at.

m3 in each rod, permits the adjustment of the length. cured fiXedly to the brakebeam frby means of bolts'mf .passing through their split ends.

From they description given .it will be evident'fthat upon the admission of airatrthe same pressure'to each of the cylinders Z0, hf,

the levers Z, Z', willbe rocked about their. LYpivots Z2 thereby transmitting Vthe braking eii'ort through the rods m, m, to the brake beam f, uniformly, and at equal distancesr iii-rom the mid point thereof. Y Accordingly,

the braking pressuresfon each of the shoes -g will beequal-and uniform per unit pressure throughout rtheir faces.

An important "found inthe inclusion in the rigging of means 'for' inaintainingthe curved 'faces g2 of the brake shoes'vconcentric with -the' treads' oi the wheels under all loads and Yi'farying conditions ot operation; 'lhis is accomplished in the 'illustrated embodiment by adjusting. the-'shoes g to proper relation tothe treads of the wheels, under the nieanv load ofthe carand then connecting the rods Y m, m', between the brake beam. f andV their respective levers Z, Z, so 'that they will normally extendalong the radius of the wheels.

This condition -is shown clearly in Figure l;

(Theoretically, it would be desirable to not Aonly have-'the pull rods-m, m",'lie along the radius of the wheels but also have them requal in length to such radius.Y This lis practically impossible, of course, since their length is Ylimited at least by the radius Vof the aide housings Z) and also bythe necessary support, such as `the brackets z', z", forithe levers Z, Z.. However, in accordance with theY present invention it is proposed to 'have the reds of nearly the same length as the radius or". the wheels 7L and normally lie alongthe radius of said wheelsl so that when' the frameV 'a moves up or down with Vvrespect toY the aXleand carries the brake shoes g with,

#it these shoes will move on 'an arc practically. concentric with the Ycenter ofthe` wheels.v Y'lhisjriiovement is Vinsured by rig-` idly connecting the ends .of the rods m, m', y to the bra-ke beam y"V and Vpivotally connecting The free. ends of the-rods are se- Y reature of the .invention isY their inner ends as at m2 to the levers Z, Z. rl`he brake beam f is pivotally suspended in the links c so, of course, moves up andrdown .bodily with these links under varying` loads but is free to turn in the links to contormio" movements or" the brake shoes Vg about the pins m2. n

The construction described insures the application of' equal pressures to the brake beam atopposite sides of its mid point and the application of equal pressuresY to the brake shoes by devices which are simple and easy toY apply to the conventional partsvoil an automotive Vrail car. rlhe invention consistsj in the combina tion of parts recited in the appendedclaims. What we claim-is: A l 1 1. In a rail car in combination with the chassis anda supporting-wheel thereforav curved brake'shoe mounted pivotally on said chassis and in operative concentric relation` to the tread ofV said wheelyanl axle onwhich the wheel isjou'rnaled and bra-ke ol'neratingV y means carried with the axle and includingy operating rod having one` end Vmovable with `the' axle and the v other endniovableV with the chassis, the last named end being iixedfwithvrelation to the brake shoe and said rod being normally disposed on a@ radius of the wheel and substantially of the saine length as the radius. Y'

V2. In a rail car in combinationlwith the VVchassis and'V traction wheels Ybrake shoesV ymounted in operative relation'thereto and concentric therewith, respectively, a brakev beam on which Ythe shoes are carried, a dead axle on which 'the wheels are journaled,

air brake cylinders and operative connec-Y the dead axle, air brake cylinders, operat.

ing levers pivoted. on the brackets.andpivotf'V ally connected lto the respective pistons,

brake shoes pivotally hungfrom Vthe chassis and operative connections ,between said levers and said brake shoes.

li. inY an automative rail car in nation with the .chassis and dead a'xle, links pivotally hung from opposite side members of the chassis a circular brake beaiii pivot-V alrly supported'in said links and extending transversely of said chassis bra-ke shoes se- Yiai y combii cured fixedly to said brake beam in line with 'Y the respective wheels, and an.',operating rod adjustably but Xedly secured to said brake secured to the brake beam at points outside of said links operating rods secured to the 15 brake beam at points inside of said links and .at equal distances on opposite sides of the mid point of the brake beam, air cylinders mounted on the axle at equal vdistantes on opposite sides of the mid point of the axle 20 and means to connect said cylinders operatively with Said opera-ting rods.

This specification signed this l day of March A, D. 1922.

FRED L. LIPCOT. CHARLES F. DRUMM, JR. MAXIMILIAN C. FRINS. 

